# load packages
library(tidyverse)
library(readr)
library(viridis)
# set figure parameters for knitr
knitr::opts_chunk$set(
fig.align = "center", # center align figures
fig.asp = 0.618, # the golden ratio
fig.retina = 3, # dpi multiplier for displaying HTML output on retina
fig.height = 4, # 4 inches
dpi = 200 # higher is crisper
)